A New Measurement of the Spectral Lag of Gamma-Ray Bursts and its Implications for Spectral Evolution Behaviors | |
Shao, Lang1,2; Zhang, Bin-Bin3,4; Wang, Fu-Ri1; Wu, Xue-Feng2,5,6; Cheng, Ye-Hao1; Zhang, Xi1; Yu, Bang-Yao1; Xi, Bao-Jia1; Wang, Xue1; Feng, Huan-Xue1,7 | |
刊名 | ASTROPHYSICAL JOURNAL |
2017-08-01 | |
卷号 | 844期号:2页码:14 |
关键词 | gamma-ray burst: general methods: data analysis radiation mechanisms: nonthermal Supporting material: figure set, machine-readable table |
ISSN号 | 0004-637X |
DOI | 10.3847/1538-4357/aa7d01 |
英文摘要 | We carry out a systematical study of the spectral lag properties of 50 single-pulsed gamma-ray bursts (GRBs) detected by the Fermi Gamma-Ray Burst Monitor. By dividing the light curves into multiple consecutive energy channels, we provide a new measurement of the spectral lag that is independent of energy channel selections. We perform a detailed statistical study of our new measurements. We find two similar power-law energy dependencies of both the pulse arrival time and pulse width. Our new results on the power-law indices would favor the relativistic geometric effects for the origin of spectral lag. However, a complete theoretical framework that can fully account for the diverse energy dependencies of both arrival time and pulse width revealed in this work is still lacking. We also study the spectral evolution behaviors of the GRB pulses. We find that a GRB pulse with negligible spectral lag would usually have a shorter pulse duration and would appear to have a "hardness-intensity tracking" behavior, and a GRB pulse with a significant spectral lag would usually have a longer pulse duration and would appear to have a "hard-to-soft" behavior. |
WOS关键词 | GRB PROMPT EMISSION ; 1ST 4 YEARS ; LUMINOSITY RELATION ; COMPREHENSIVE ANALYSIS ; ENERGY-DEPENDENCE ; PHYSICAL ORIGINS ; PEAK LUMINOSITY ; PULSES ; LONG ; CATALOG |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP PUBLISHING LTD |
WOS记录号 | WOS:000406652900004 |
内容类型 | 期刊论文 |
源URL | [http://libir.pmo.ac.cn/handle/332002/22634] |
专题 | 中国科学院紫金山天文台 |
通讯作者 | Shao, Lang |
作者单位 | 1.Hebei Normal Univ, Dept Space Sci & Astron, Shijiazhuang 050024, Hebei, Peoples R China 2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 3.CSIC, IAA, POB 03004, E-18080 Granada, Spain 4.Scientist Support LLC, Madsion, AL 35758 USA 5.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Peoples R China 6.Nanjing Univ, Joint Ctr Particle Nucl Phys & Cosmol, Purple Mt Observ, Nanjing 210008, Peoples R China 7.Chinese Acad Sci, Key Lab Space Astron & Technol, Natl Astron Observ, Beijing 100012, Peoples R China |
推荐引用方式 GB/T 7714 | Shao, Lang,Zhang, Bin-Bin,Wang, Fu-Ri,et al. A New Measurement of the Spectral Lag of Gamma-Ray Bursts and its Implications for Spectral Evolution Behaviors[J]. ASTROPHYSICAL JOURNAL,2017,844(2):14. |
APA | Shao, Lang.,Zhang, Bin-Bin.,Wang, Fu-Ri.,Wu, Xue-Feng.,Cheng, Ye-Hao.,...&Xu, Dong.(2017).A New Measurement of the Spectral Lag of Gamma-Ray Bursts and its Implications for Spectral Evolution Behaviors.ASTROPHYSICAL JOURNAL,844(2),14. |
MLA | Shao, Lang,et al."A New Measurement of the Spectral Lag of Gamma-Ray Bursts and its Implications for Spectral Evolution Behaviors".ASTROPHYSICAL JOURNAL 844.2(2017):14. |
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